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 Simblong - Professional Plastic Injection Molding Manufacturer Since 2012
Flexible Support. Integrated Manufacturing.
From precision injection-molded parts and surface-finished components to subassemblies and fully assembled products, Simblong gives you the flexibility to use the capabilities you need—with one accountable team supporting quality, coordination, and production scale-up.
Why Choose Us?

Turning Complex Precision Manufacturing Challenges into Your Market Advantage

Collaborative Manufacturing Services — From Design for Manufacturing to Mass Production, Ensure Your Project's Success from the Start

Reduce complexity by consolidating engineering, molding, production, and quality under one accountable team.

Eliminate costly rework and launch delays through early-stage design and process evaluation.

Deploy a full suite of in-house capabilities: mold design & fabrication, injection molding, surface finishing, assembly, testing, and packaging validation.

Accelerate Time-to-Market, Mitigate Risks at the Source
Point A: Collaborative Engineering, One Single Point of Contact
Your Challenge: High communication costs, difficult issue tracing, and unclear responsibility across multiple suppliers.
Our Solution: One dedicated project team coordinating structure, materials, tooling, manufacturing, quality, and delivery.
Value to You: Simplified supply chain management, transparent process control, and significantly reduced project management complexity.

Point B: Early DFMA Intervention, Solve Problems Before Tooling
Your Challenge: Costly design changes, rework, and project delays discovered only during the tooling phase.
Our Solution: In-depth evaluation of product structure, material selection, tooling feasibility, assembly, and packaging before tooling kick-off.
Value to You: Prevent inherent defects at the source, avoid expensive ECOs (Engineering Change Orders), and ensure on-time project launch.


Guarantee Premium Quality, Meet the Most Stringent Standards

Point A: Class 100,000 Cleanroom for Precision Optical & Electronic Components
Your Challenge: Dust and particulates in standard workshops contaminate sensitive parts (LIDAR windows, sensors), degrading performance and lifespan.
Our Solution: An 800 m² Class 100,000 (ISO 8) cleanroom injection molding workshop with strict environmental controls.
Value to You: Clean manufacturing environment ensures optical clarity, electronic reliability, and overall quality for medical, optical, and electronic applications.


Point B: Full-Process Quality Control with Full Traceability
Your Challenge: Inconsistent batch-to-batch quality leads to field failures, brand reputation damage, and high after-sales costs.
Our Solution: Closed-loop quality system covering IQC, IPQC, appearance inspection, functional testing, and batch traceability, plus packaging drop and transport simulation tests.
Value to You: An "end-to-end insurance policy" for your supply chain, minimizing production and logistics risks to protect your brand equity.
Support Business Growth, Ensure Long-Term Supply Stability

Point A: Flexible & Scalable Production Capacity
Your Challenge: Supplier capacity constraints fail to meet rapid scale-up needs for new product launches or peak seasons, resulting in lost market opportunities.
Our Solution: 80+ injection molding machines, 2 automated spray lines, and 6 assembly lines, flexibly supporting from component to finished product assembly.
Value to You: Reliable capacity assurance and flexible scalability, allowing your business growth to proceed without supply chain bottlenecks.


Point B: Lifecycle Partnership, Not Just a "One-Time" Supplier
Your Challenge: Slow response to post-launch needs like mold maintenance, process adjustments, and engineering changes, disrupting production continuity.
Our Solution: Ongoing technical support throughout the product lifecycle, including routine mold maintenance, process optimization, and ECO implementation.
Value to You: A long-term technical partner focused on minimizing your downtime and ensuring consistent part quality over the entire product lifecycle.


Your Partner in Precision Manufacturing

We understand that you are not just looking for a supplier of injection-molded parts. You need a behind-the-scenes partner who can share technical risks, deliver consistent quality, and scale with your business.


Let's work together to turn precision manufacturing into your core competitive advantage. Contact us today.

Manufacturing & factory
Integrated Manufacturing Built for Flexibility and Scale
From in-house mold manufacturing and injection molding to surface finishing, assembly, and cleanroom production, our integrated resources support both individual processes and coordinated manufacturing programs.

Manufacturing Strength at a Glance
Founded
Manufacturing Facility
Team Members
30+
Mold-Making & Maintenance Machines
80+
Injection Molding Machines
2+
Automated Spray Coating Lines
10+
Printing & Marking Machines
Class 100,000 Cleanroom
6+
Finished-Product Assembly Lines
Manufacturing Areas
Product Engineering
Structural and electronic engineering support for product development, DFMA, validation, and production readiness.
Mold Manufacturing
In-house mold design, precision machining, fitting, trials, validation, and ongoing production support.
Injection Molding
More than 80 injection molding machines support flexible production requirements from component manufacturing to volume production.
Surface Finishing
Two automated spray coating lines, together with silk screen printing, pad printing, and decorative marking capabilities.
Assembly & Testing
Six assembly lines support component integration, functional testing, final inspection, and finished-product production.
Cleanroom Production
An 800 m² Class 100,000 cleanroom supports products and processes with controlled environmental requirements.
Factory Tour
Take a Closer Look Inside Our Factory
Ready to Bring Your Product to Scale?

Whether you need a single manufacturing process or a fully integrated program, our engineering and manufacturing teams are ready to support your next project.
From Product Engineering to Scalable Manufacturing.
Since 2012, Simblong injection molding manufacturer has supported established brands and emerging hardware innovators with integrated product engineering and flexible manufacturing—from precision injection-molded and surface-finished components to subassemblies and fully assembled products.



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Add: No. 4, Wanan Road, Zhenan Industry Park, Changan Town, Dongguan City, Guangdong Province China
Contact Us
Contact person: Spencer Chen
Tel: +86-134 2864 0022
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